Mercurial > hg > truffle

comparison src/share/vm/runtime/os.cpp @ 12144:d8e99408faad

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193 Summary: don't re-evaluate stack bounds for main thread before install guard page Reviewed-by: coleenp, dholmes, dlong
author dsamersoff
date Thu, 29 Aug 2013 21:48:23 +0400
parents 5e3b6f79d280
children c636758ea616
comparison
equal deleted inserted replaced
12142:76482cbba706 12144:d8e99408faad
1422 } 1422 }
1423 } 1423 }
1424 return result; 1424 return result;
1425 } 1425 }
1426 1426
1427 // Read file line by line, if line is longer than bsize,
1428 // skip rest of line.
1429 int os::get_line_chars(int fd, char* buf, const size_t bsize){
1430 size_t sz, i = 0;
1431
1432 // read until EOF, EOL or buf is full
1433 while ((sz = (int) read(fd, &buf[i], 1)) == 1 && i < (bsize-2) && buf[i] != '\n') {
1434 ++i;
1435 }
1436
1437 if (buf[i] == '\n') {
1438 // EOL reached so ignore EOL character and return
1439
1440 buf[i] = 0;
1441 return (int) i;
1442 }
1443
1444 buf[i+1] = 0;
1445
1446 if (sz != 1) {
1447 // EOF reached. if we read chars before EOF return them and
1448 // return EOF on next call otherwise return EOF
1449
1450 return (i == 0) ? -1 : (int) i;
1451 }
1452
1453 // line is longer than size of buf, skip to EOL
1454 char ch;
1455 while (read(fd, &ch, 1) == 1 && ch != '\n') {
1456 // Do nothing
1457 }
1458
1459 // return initial part of line that fits in buf.
1460 // If we reached EOF, it will be returned on next call.
1461
1462 return (int) i;
1463 }
1464
1465 void os::SuspendedThreadTask::run() { 1427 void os::SuspendedThreadTask::run() {
1466 assert(Threads_lock->owned_by_self() || (_thread == VMThread::vm_thread()), "must have threads lock to call this"); 1428 assert(Threads_lock->owned_by_self() || (_thread == VMThread::vm_thread()), "must have threads lock to call this");
1467 internal_do_task(); 1429 internal_do_task();
1468 _done = true; 1430 _done = true;
1469 } 1431 }